The correct option is A 33 nickels
The prices of the four lamps are 33 nickels, 36 nickels, 63 nickels, and 66 nickels.
Among the two digits 3 and 6, 3 is the smallest.
Hence, the tens place of the price should be 3.
Since repetition is allowed, the ones digit can also be 3.
The smallest number formed from the digits is 33.
Hence, the price of the floating lantern is 33 nickels.